废橡胶粉对SBS改性沥青的老化性能影响研究

Research of crumb rubber on aging properties of SBS modified asphalt

在SBS改性沥青中加入糠醛抽出油溶胀后的活化废橡胶粉制备SBS/胶粉复配改性沥青,并对其热老化前后的软化点、针入度、延度等性能进行测试,表明在SBS改性沥青中加入胶粉并不影响改性沥青的热老化性能,而且对改性沥青的耐热老化性能还有一定程度的提高.对几组复合改性沥青的紫外线老化试验也表明加入废橡胶粉能够提高改性沥青的抗紫外老化性能.

SBS modified asphalt with crumb rubber was prepared by adding the activated crumb rubber swelled by furfurat extraction oil into SBS, their softening point, penetration, ductility and other properties before or after thermal aging were measured. The results indicate that adding crumb rubber into SBS modified asphalt can not only decrease the properties of thermal aging of the modified asphalt but increase them to some extent. A few Ultraviolet radiation aging experiments of the composite modified asphalt also show that adding crumb rubber can improve Ultraviolet radiation aging resistance of the modified asphalt.